Metal flashing



Dec. 12, 1933. CHENEY 1,939,619

METAL FLASHING Original Filed Dec. 2, 1950 Iii 9.1.

17 1M 7% if! 11% Allan, aha/may Patented Dec. 12, 1933 METAL FLASHING Allan Cheney, Melrose, Mass, assignor to The Cheney Company, Winchester, Mass., a corporation of Massachusetts Original application December 2, 1930, Serial No.

499,498, now Patent No.

1,871,585, granted August 16, 1932. Divided and this application February 3, 1932. Serial No. 590,743

14 Claims.

The present invention relates to, sheet metal flashings for buildings, such as masonry structures and aims generally to improve existing types of flashings.

In the use of sheet metal flashings of the through-wall type, that is, wherein the flashing sheet extends through the wall from side to side, or substantially so, so as to prevent effectively any seepage of water or moisture of infiltration down through the masonry wall, it is desirable and necessary to provide means for locking the flashing sheet and mortar together so as to provide a mechanical bond between the flashing sheet and wall.

The present invention aims to improve the above stated conditions and such prior arrangements and relates in part to features disclosed in my Patents Nos. 1,715,000 and 1,728,955 as will more fully appear, and. the subject matter of the 20 present application, which presents certain specific characteristics not claimed in my prior patents above referred to, is taken from my prior copending application, Ser. No. 499,498, filed December 2, 1930, of which this application is a division.

In the illustrated embodiments of the invention, as-shown in the accompanying drawing Fig. 1 is a perspective view of one form of flashing according to my present invention;

Fig. 2 is a detail sectional view through a section of masonry wall showing a section of my improved sheet metal flashing in place;

Fig. 3 is a diagrammatic longitudinal section view illustrating the shape of the pre-formed flashing sheet according to one embodiment of the invention;

Figs. 4, 5, 8, and 7 are similar views illustrating other embodiments of the invention; and

Fig. 5 is a detail sectional view showing one 40 manner of interlocking the flashing sheets together according to one form of the invention shown in Fig. 5.

According to the invention, the flashing sheet 10 is preferably formed of sheet material, such as metal and preferablycopper, lead or other metal or alloy, and is of desired width to extend from side to side, or substantially so, of the wall in which it is to be used, and thus constitute a through-wall flashing. For use in'certain places the sheet may be provided with a longitudinal flange 11 serving asa counter flange.

In order toprovide a mechanical bond between theflashing sheet and masonry wall, I have found it advantageous to preform the flashin: sheet so as to provide locking means aifording a mechanical lock with the mortar. These locking means may conveniently take the form of angular bends 13 in the metal sheet, in the illustrated embodiment presenting transverse parallel ribs. The bends obviously may be of any desired shape for the purpose, and preferably present oppositely inclined re-entrant recesses on opposite sides of the sheet and bends, for the reception of mortar which, when hardened, will afford a mechanical bond between the sheet and mortar against movement in opposite directions longitudinally as well as verti-' cally.

It is desirable in using through-wall flashings in masonry structures that the flashing sheet or section be fully embedded in the mortar of the joint, and to this end it is desirable that the sheet have sufllcient rigidity both longitudinally and transversely so that it will lie evenly and centrally in the mortar bed. In certain designs of flashing wherein the locking means or bends in the metal sheet are disposed relatively close together, adequate stiffness and rigidity of the sheet is provided, but such an arrangement, if carried too far, results in the weakening of the 30 joint or bond.

Accordingly in certain installations, it is advantageous to space the locking means to a greater extent and it is desirable to reinforce the sheet between the locking means by ribs, cleats 35 or the like, to add to its stifiness as an aid to maintaining the sheet symmetrical with the mortar joint, and also to avoid tendency of the sheet to sag between the locking means which has a tendency to hinder proper drainage of moisture from the wall.

In the embodiment of the invention illustrated in Fig. 3 the sheet may advantageously be formed with relatively short or low bends 13 presenting oppositely disposed and reversely inclined recesses on the opposite sides of the sheet for the reception of mortar. Intermediate these locking .bends 13 are provided reinforcing means 14 for 6 and 7 wherein the ribs or locking means 13 may be Z-shaped or dovetailed, and certain intermediate ribs l4 be flattened or otherwise formed to constitute intermediate reinforcing means.

The embodiment illustrated in Fig. 5 differs somewhat from the other illustrated forms in that alternate ribs 13 or locking means extend from opposite faces of the sheet, this having the advantage of affording a wider or longer uninterrupted locking tongue of mortar, and thus increasing the strength of the bond. This section, however, is of slightly greater thickness and requires a thicker joint, but in such cases where this is permissible it has the above-named advantage. As illustrated, certain of the ribs 14 are shaped, as by flattening, to afford reinforcing or stiffening means intermediate adjacent looking means.

In order that the flashing sheets may be securely locked together in the masonry, opposite ends of each sheet may be formed with reversely bent flanges 17 as shown, or the transverse ribs may be so shaped as in Figs. 5 and 5 as to fit together and form a means for interlocking the flashing sheets together.

Obviously other forms and arrangements of locking means may be used so long as the tendency is to provide opposite reentrant recesses for the mortar on opposite sides of the sheet, and the reinforcing means contemplated by this invention need not necessarily be flattened as other ribs or corrugations of slight height or partly flattened may be used.

Advantages of the invention reside in the greater usefulness of through-wall flashings, particularly where it is desirable that the looking means or ribs are not too closely spaced together, the provision of the intermediate reinforcing or stiffening means permitting a larger area of the sheet to lie symmetrically in the plane of the mortar joint, thus assuring that a greater area of the sheet be covered or embedded in the mortar bed to a more uniform degree.

Having described my invention, I claim:

1. A sheet metal flashing for use in masonry walls or like structures comprising a section of sheet metal of desired width to extend substantially from side to side of said wall, said sheet being preformed to provide a series of longitudinally spaced, transversely extending locking means for the reception of mortar on opposite sides of the sheet adapted upon hardening of the mortar to lock said sheet against relative longitudinal and transverse movement with respect to said wall, and additional means extending transversely of the sheet intermediate certain of said locking means for reinforcing and stiffening the sheet whereby the body of the sheet intermediate said locking means is maintained substantially flat and free from bends.

2. A sheet metal flashing according to claim 1 characterized by deforming the sheet to provide locking means which present on opposite sides of the sheet, reversely inclined recesses for the reception of mortar.

3. A sheet metal flashing according to claim 1 in which the locking means are substantially Z-shaped.

4. A sheet metal flashing according to claim 1 in which the locking means are triangularly shaped.

5. A sheet metal flashing according to claim 1 in which the locking means are of dove-tailed shape.

6. A sheet metal flashing according to claim 1 in which alternate locking means extend from opposite faces of sheet so as to increase the number of locking bonds between the mortar and sheet and increase the length of each bond.

'7. A sheet metal flashing for masonry structures and the like comprising a sheet of metal provided with a. plurality of ribs and grooves across the face thereof, the ribs of said sheet having side faces presenting reentrant recesses on opposite sides of the sheet for the reception of mortar, certain of said ribs being depressed to reinforce said sheet.

8. A sheet metal flashing for masonry structures and the like comprising a sheet of metal of desired width to extend through a masonry wall and provided with transversely extending parallel ribs and grooves across the sheet so that the grooved portions thereof intermediate said ribs constitute drainage areas for draining water of infiltration across said sheet and from said wall, the ribs of said sheet having side faces presenting undercut recesses on opposite sides of the sheet for the reception of mortar which, upon hardening, will bond the flashing sheet in said mortar against movement vertically and longitudinally, the ends of said sheet being adapted for cooperative engagement with adjacent sheets whereby a plurality of sheets may be connected together to form a continuous metal flashing.

9. A through-wall flashing for masonry walls comprising a sheet of metal of desired width to extend substantially through said wall, said sheet being formed with a plurality of spaced transversely extending ribs, each having at least one of its sides overhanging to provide undercut recesses on opposite sides of the sheet for the reception of mortar which, upon hardening, will bond the flashing sheet and masonry together against relative movement vertically and laterally, the area of the sheet between said ribs providing for draining of water of infiltration across said sheet to the side edges thereof, the end ribs of adjacent sheets being symmetrical and adapted to fit one over the other whereby a plurality of sheets may be interlocked together to form a continuous sheet metal flashing.

10. A through-wall flashing for masonry walls comprising a sheet of light readily bendable metal of desired width to extend substantially through said wall, said sheet being formed with a plurality of spaced dovetail ribs extending transversely across said sheet, the sides of said ribs being undercut to provide a plurality of reentrant recesses on the opposite sides of said sheet for the reception of mortar which, upon hardening, will bond the sheet and masonry together against relative movement vertically and laterally, the body of the sheet between said ribs affording free drainage of water of infiltration to the side marginal edges thereof, the end ribs of adjacent sheets being symmetrical and adapted to fit one over the other whereby a plurality of sheets may be interlocked together to form a single continuous metal flashing.

11. A through-wall flashing for masonry walls comprising a sheet of light readily bendable metal of desired width to extend substantially through said wall, said sheet being formed with a plurality of spaced dovetail ribs extending transversely across said sheet, the sides of said ribs being parallel and undercut to provide a plurality of reentrant recesses on the opposite sides of said sheet for the reception of mortar which, upon hardening, will bond the sheet and tion toward the side edges of said sheet, the end ribs oi adjacent sheets being symmetrical and adapted to flt one over the other whereby a pluraiity of sheets may be interlocked together to form a single continuous metal flashing.

12, A through-wall flashing for masonry walls comprising a sheet of light readily bendable metal of desired width to extend substantially through said wall, said sheet being formed with a plurality of spaced dovetail ribs and grooves extending transversely across the sheet, the sides of said ribs and grooves being undercut to provide a plurality of reentrant recesses on they opposite sides oi the sheet for the reception oi mortar which, upon hardening, will bond the sheet and masonry together against relative movement verticallyand laterally, the body of said sheet constituting said grooves according tree drainage of water of infiltration to the side mar-- ginal edges, the ends of adjacent sheets being respectively symmetrical and adapted for interlocking engagement with each other whereby a plurality of sheets naay be readily connected together to form a sing e continuous metal flashing.

13. A through-wall flashing i'or masonry walls comprising a sheet of light readily bendable metal oi desired width to extend substantially through said wall, said sheet being formed with I CERTIFICATE Patent No. 1,939,619.

a plurality oi spaced parallel dovetail ribs and grooves extending transversely across the sheet, the sides of said ribs and grooves being undercut to provide a plurality of reentrant recesses on the opposite sides of the sheet for the reception of mortar which, upon hardening, will bond the sheet and masonry together against relative movement vertically and laterally, the bodyof said sheet constituting said grooves afl'ording free drainage 0! water oi infiltration to the side marginal edges, the end ribs and grooves of adjacent sheets being symmetrical and one end formed with an upturned flange adapted for interlocking engagement with'a bettom groove oi an adjacent sheet whereby said sheets may be. interlocked together to form a continuous metal flashing.

14. A sheet metal flashing for masonry structures and the like comprising a sheet otmetal of desired width to extend through a masonry wall and provided with a plurality oi transversely extending parallel ribs arranged across said sheet, said ribs being spaced apart to provide intermedi te drainage grooves for draining water of mm ation toward the side edges of the sheet and from said wall, the end portions of said sheet being symmetrical and adapted for interlocking engagement with complementary ends of adjacent sheets whereby a plurality oi. separate sheets may be connected together to form acontinuous sheet metal flashing.

- 1 ALLAN CHENEY.

or. connection. I December 12, 1933.

ALLAN CHENEY- it is hereby certified "that error appears in the printed specification of the above numbered patent requiringcorrection. as follow? 'Page 3, line 4 claim 1 ll, for "or" read of; and that'ihesa'id Letters Patent should be read withv this correction therein that the same may conform to the record of the case in the Patent Office Signed and sealed this Bib llay of February, 1934.

I: (Seaii' 1r. a. Hopkins" "Acting- Commissioner of Patents. 

